In February of 1967, Mercury released a single called "We Ain't Got Nothin' Yet", written by band members, Gilbert, Scala and Esposito. The song was a Top Twenty hit for the Magoos in America and finished at number 72 for the entire year, but failed to achieve the same success in the UK. A follow up hit was even harder to come by for the Magoos and their next effort, "There's A Chance We Can Make It" was mostly ignored. Subsequent efforts, "One By One", "I Wanna Be There" and "Life Is Just A Cher O'Bowlies" also failed to gain any attention. One last single release on Mercury called "I Can Hear The Grass Grow", issued in 1968, also missed the charts. By now, tensions were growing among the members of the band and the original line up split.
On the strength of their name alone, the band's management team re-signed the group to ABC Records, and as Emil Thielhelm had accumulated a backlog of material, suggested he front a revamped line-up. John Leillo played vibes, Eric Kaz was now on keyboards, Roger Eaton played bass and Richie Dickon became the drummer. In 1969, the band completed the album "Never Goin' Back To Georgia", while the same group, except for Eaton, was augmented by session musicians for the disappointing 1970 LP, "Gulf Coast Bound". Neither of these sold well and after hanging on for another two years, The Blues Magoos packed it in. Thielhelm took a role in the Rock musical Hair using the name Peppy Castro. He later pursued a varied career as a member of Barnaby Bye, Wiggy Bits and Balance, while Cher and KISS are among the artists who have recorded his songs. Organist, Eric Kaz went on to form American Flyer.
On November 9th, 2000, The Blues Magoos, featuring Emil "Peppy" Thielhelm and Ralph Scala played at a garage band revival show called Cavestomp. In July 2008, Blues Magoos, with original members Ralph Scala and Geoff Daking, reunited for the first time in years for two concerts, including one with The Zombies at the Fillmore New York. In December 2009 they traveled to Spain for the Purple Weekend festival. In 2014, The Blues Magoos were slated to release their first new album in 41 years, titled "Psychedelic Resurrection". A Nationwide tour followed in 2015, but no other shows were scheduled after that.
Although they were only "one hit wonders", Blues Magoos, with their electric suits and giant, on stage lava lamps, are fondly remembered as a classic example of the Psychedelic music era.